Question 1168927
.
<pre>

    {{{x^2}}} + {{{(x+12)^2}}} = {{{60^2}}}.


Solve this quadratic equation.


Or notice that  (x, x+12, 60) is a classic (3,4,5)-right angled triangle with the sides of 36 in, 48 in and 60 in.
</pre>

Which way you choose, depends on your choice.